📚🔥Chemistry 1.3 -Mass Spectromacy

Question 1

What does a mass spectrometer do?

Answer 1

Find the mass of iscotopes of an element and their relative abundance

Question 2

Name the order of stages in a mass spectrometer

Answer 2

Vaporisation
Ionisation
Acceleration
Deflection
Detection 

(VI ADD)

Question 3

Describe the vaporisation process

Answer 3

The sample is heated before it enters the spectrometer

Question 4

Describe the process of ionisation

Answer 4

A gaseous sample is bombarded with high energy electrons to form positive ions

Question 5

Describe the process of acceleration

Answer 5

An electric field accelerate the positive ions to High speed

Question 6

Describe the process of deflection

Answer 6

A magnetic field deflects the ions according to their mass/charge ratio

Question 7

Which ions are deflected more heavy or light?

Answer 7

Light ions are deflected more than heavier ions because they have a smaller mass

Question 8

Describe the process of detection

Answer 8

Ions with the correct mass/charge ratio pass through a slit and are detected by an instrument such as an electrometer
The signal is then amplified and recorded

Question 9

Why does mass spectrometry take place inside a vacuum?

Answer 9

To prevent collision with air molecules